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net: Kill skb_truesize_check(), it only catches false-positives.

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A long time ago we had bugs, primarily in TCP, where we would modify
skb->truesize (for TSO queue collapsing) in ways which would corrupt
the socket memory accounting.

skb_truesize_check() was added in order to try and catch this error
more systematically.

However this debugging check has morphed into a Frankenstein of sorts
and these days it does nothing other than catch false-positives.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2009-02-17 21:24:05 -08:00
parent 34edaa8832
commit 92a0acce18
4 changed files with 0 additions and 19 deletions
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9
include/linux/skbuff.h
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@@ -416,15 +416,6 @@ extern void skb_over_panic(struct sk_buff *skb, int len,
void *here);
extern void skb_under_panic(struct sk_buff *skb, int len,
void *here);
extern void skb_truesize_bug(struct sk_buff *skb);
static inline void skb_truesize_check(struct sk_buff *skb)
{
int len = sizeof(struct sk_buff) + skb->len;
if (unlikely((int)skb->truesize < len))
skb_truesize_bug(skb);
}
extern int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
int getfrag(void *from, char *to, int offset,